113538239 has 4 divisors (see below), whose sum is σ = 114640656. Its totient is φ = 112435824.

The previous prime is 113538221. The next prime is 113538253. The reversal of 113538239 is 932835311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932835311 = 23 ⋅40558057.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113538239 is a prime.

It is a super-2 number, since 2×113538239² = 25781863430442242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113538199 and 113538208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113538289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551054 + ... + 551259.

It is an arithmetic number, because the mean of its divisors is an integer number (28660164).

Almost surely, 2^113538239 is an apocalyptic number.

113538239 is a deficient number, since it is larger than the sum of its proper divisors (1102417).

113538239 is a wasteful number, since it uses less digits than its factorization.

113538239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102416.

The product of its digits is 19440, while the sum is 35.

The square root of 113538239 is about 10655.4323703921. The cubic root of 113538239 is about 484.2251971521.

The spelling of 113538239 in words is "one hundred thirteen million, five hundred thirty-eight thousand, two hundred thirty-nine".